Ichigo vs Aizen wasn't short. it started in ep 308 and ended near the end of 309. the short one was Ichigo vs Ginjo. although you saw some clips of the fighting from ep362 to ep 365 the real fight is in the first few minutes of 366.

Kempochi( I like to call him Kenny like his lieutenant) and the time dude in bleach it was literally 1 second HAHAHA but that was awesome I was like "and ichigo get that guy, Ichigo is awesome!!!!!!!!" Sorry if i got words spelt wrong bad speller

LOL yeah, not bad for a 25 year old. Time to think i'm clever for taking the piss out of someone with learning difficulties, HOHOHOHO, DIS GONNA BE GOOD

Spike vs Vicious from Cowboy Bebop was too short but it was awesome anyways

Problem with that fight being longer is that it's not Shonen so they won't be able to yell and get powerups thereby extending the fights life to unreasonable points, it was a fight between two Humans not some other worldy beings. I think short confrontations like that have a certain charm to them